PEOPLE OF THE BOOK by David Stacton. 381 pages. Putnam. $5.95.
"It was a model of the world, with the roof taken off and the streets torn up," is Author Stacton's description of a Spanish army bivouac into which a couple of his characters have strayed during the Thirty Years War. Stacton could also be describing his own novel abovit that war. In that camp, the civilians—stable boys, prostitutes, grooms, bakers, wine sellers, nurses, wives, peddlers, moneylenders, cardsharps, children, thieves, thugs, priests, a company of traveling actors—outnumber the soldiers by as much as eight to one, and the same wild and brutalized...